Patents by Inventor Kenichiro Satoyama

Kenichiro Satoyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Control circuit for a solenoid-operated actuator
    Patent number: 4446410
    Abstract: A control circuit comprises a switching element connected in series with the coil of an actuator for generating a drive current when rendered conductive. A drive current sensing resistor is coupled in a circuit with the switching element and the coil to develop a first voltage in response to the switching element being rendered conductive. A surge current sensing resistor is coupled in a circuit with the coil through a unidirectionally conducting element to develop a second voltage in response to the switching element being rendered nonconductive. The first and second voltage are amplified and fed to a differential integrator to which an actuator control signal is also applied. The output of the differential integrator is compared with the instantaneous value of a ramp voltage to generate gating pulses applied to the switching element.
    Type: Grant
    Filed: January 21, 1982
    Date of Patent: May 1, 1984
    Assignee: Nippondenso Co., Ltd.
    Inventors: Toshiaki Yagura, Kenichiro Satoyama, Kazutoshi Morisada, Ryoichi Yamamoto, Seietsu Yoshida